Art of separating paper pulp



C. W. UNKLE AND T. D. GRILEY.

ART OF SEPARATING PAPER PULP.

APPLICATION FILED J'UNE 3.1918. RENEWED MAY I, 1922.

Patented Dec. 5, 1922.

U, I 1 2 I I 14 Fig.1 40 g2 & e00re.my

Patented e c. 5, 1 922.

STAT-ES PATENT OFFICE.

ART SEPARATING PAPER PULP.

Application filed me a, 191s, Serial No. 237,863. "renewed May 1, 15522. Serial mi. 557,779..

To all'wlwm it may concern:

"Be it known that. we, CHARLES W.

UNKLE and THEODORE D. GRILEY, citizens of the United States, residing at Baltimore, in the-county of F airfield and State of Ohio,

have invented a certain new and useful Im rovement in the Art of Separating Paper ulp, of which the following is a specification.

. rating the finished from the unfinished pulp in tub heaters. In carrying out our invention we utilize centrifugal action and can employ the machine shown and described hereln.

In said'drawing- Figure '1 is'a top plan view with portions in section. k

Fi 2 is a partial section on the line H I Fig. 1, looking to the left. i

In the views 5 desig'nates the elongated tub in which the paper to be pulped with the necessary water 1- other liquids used in the process are placed. Secured in this 125 tub longitudinally isthe usual mid-feather 6 r of such length and so placed as to permit a circulation of the material" around the tub when it is impelled at one side of the mid feather.

In one of the spaces between the midfeather and a side of the tub is the usual roll 7 of wood and containing knives or fly-bars cooperating with the usual bed plate (not shown) in the bottom below. The roll is fastened to a shaft 8 provided with a belt pulley as at 9 for drivin the roll. The tub also contains the usual fiack fallat 10.

The roll is inclosed at its upper side in a hood 11 and in a flattened portion at 12 of that side of the hood opposite the back fall we provide a series of perforations 13. Se-

cured on a rod 14 lying on the fiat portion 12 is a series of plates 15 having sharp edges so that when the rod is reciprocated the plates cut portions of the paper stock protruding'through all the perforations and clear. them for the passage of material as hereinafter further explained.

This invention relates to the art of sepa-- To reciprocate the rod we provide the following means:

.That end of the shaft containing the roll is provided with a spur gear 16 to mesh with a spur gear 17 journaled in a suitable bracket 18; The spur gear'17 has connected with it a beveled gear 19 which in turn meshes with a beveled gear 20 on one end of a short shaft 21 journaled in suitable bracket 22 on the side of the tub. The other end of the shaft 21 is provided with a disk 23 having a crank pin 24 that works in a slotted yoke 25 securedto the end of the aforesaid rod 14. When the shaft 8 is rotated, therefore, the revolution of the crank pin 24 imparts a rectilinear reciprocating motion to the rod 14.

Located below the perforationsl3 is an inclined trough or gutter 26 which is ex- "tendedto beyond the opposite side of the tub so'as to discharge the pulp into a suitable receptacle placed there for the purpose.

The gutter 26 has a lateral discharge 27 into the tub beyond the mid-feather.

28- designates a removable gate fitting in grooves 29 of the lateral discharge 27 so that the .contents of the gutter will be directed to the receptacle beyond the tub. When said receptacle is to be removed or changed the gate 28 is placed in the grooves 30 thereby causing the contents of the gutter to discharge into the tub. The flow of the contents of the gutter can thus be changed without stopping the pulping operation.

In practice the roll is turned in the direction of the arrow Fig. 2 and centrifugal action throws the stock against the inner side of the fiatportion 12. The-perforations permit the sufliciently reduced portions to pass through said perforations and into the gutter. The larger portions clog and protrude through said perforations but are cut off, removed or pushed back into the tub by the reciprocated plates 15.

What we claim is: I .1. In the art of pulping paper the proce% of continuously separatipg the sufiicientlv reduced portions of pulp from the insufficiently reduced portions durin the grinding operation consisting in PIOJGCtiIlg both portions by centrifugal action directly against a screenand at angles thereto, said screen adapted to permit the passage of the sufiiciently reduced portions and in the meanwhile clearing the insufficiently reduced portions from said screen.

2. In the art of pulping paper the process 10 of separating the sufficiently reduced por tions of the pulp from the insufficiently reduced portions during the grinding operation consisting in projecting both portions by centrifugal action directly against a screen to permit the passage of the sufficiently reduced portions and meanwhile scraping the insufficiently reduced portions from said screen.

' CHARLES W. UNKLE.

v THEODORE D. GRILEY 

